An English teacher travels back in time to prevent the Kennedy assassination, but discovers he is attached to the life he has made in a bygone era.

In order to make good with his former employers, a submarine captain takes a job with a shadowy backer to search the depths of the Black Sea for a submarine rumored to be loaded with gold.

With only one ally, an injured Roman warrior bent on restoring his family name sets off on a quest to find his missing father's legion and lost emblem.